0 to have a continuous up and down shape or movement, like waves on the sea:
the undulating countryside
Outside at of this region, the envelope undulates in a way qualitatively similar to that observed for the linear case.
Sandstone beds are massive, graded, planar laminated, undulating laminated, or hummocky cross-stratified.
Rugged terrain in the study area is characterized by small gently undulating valleys with few minor steep bluffs.
Shorter pinnules are 2.0 mm long and 1.5 mm wide, with slightly undulate margins and rounded apex.
It is as if a piece of wood is undulating on the surface of the ocean with no apparent direction.
The pinnules are rounded with gently undulate margins.
The topography undulates gently by about 20 m in altitude.
Slender forms are narrower and longer, with a sub-terminal kinetoplast and no obvious undulating membrane.
